throughout the matrix [4,5]. After synthesis, CaFe2O4 physical and chemical behavior was studied, verifying its stability as pigment under industrial conditions.also physical and chemical properties.mines not only stoichiometric and morphologic control but pigment should be insoluble in glazes (substrate) [3

Since their commercialization in the 1990s, lithium-ion batteries have been widely used as electric power supply of portable electronic devices [1].Lithiated transition metal oxides such as LiCoO2 and spinel-type

Structural and magnetic properties of polycrystalline CaFe

ABSTRACT. A high-pressure modification of NaA1SiO, with the calcium ferrite structure was synthesized at pressures higher than 24 GPa using a double-stage split-sphere type high-pressure apparatus. The unit cell dimensions are: a=10.1546(8), b=8.6642(8), c= 2.7385(4) A, and V = 240.93(3) A a

ABSTRACT: Large single crystals ( … 5 L 33 mm) of hematite (R-Fe2O3) have been grown using a CaFe4O7-based solvent and 8 bar of oxygen in a four-mirror optical floating zone furnace in the traveling solvent zone configuration. The crystals grow along the [001] direction, are of excellent quality

Abstract The decomposition of hexachlorobenzene (HCB) has been investigated over ultrafine Ca–Fe com-posite oxide catalyst (Ca/Fe atomic ratio was 3.4), CaO and a-Fe2O3 by using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Adsorption experiments on the surface

Sveinbergeite, Ca(Fe2+6 Fe 3+)Ti2(Si4O12)2O2(OH)5(H2O)4, is a new astrophyllite-group mineral discovered in a syenite pegmatite at Buer on the Vesterøya peninsula, Sandefjord, Oslo Region, Norway. The mineral occurs in pegmatite cavities as 0.010.05 mm thick lamellar (0.20.56510 mm) crystals

systems of the vibrational modes for the cubic spinel structure, for the CaFe2O4-type structure (Pnma) in ZnAl2O4 and for marokite (Pbcm) ZnGa2O4. Additionally we report a second order phase transition in ZnGa2O4 from the marokite towards the CaTi2O4-type structure (Cmcm), for which we also calculate

, an assessment is made on the anisotropy of order parameter in the superconducting state of LaFeAsO1−xFx, CaFe1−xCoxAsF, and Ba1−xKxFe2As2 (x = 0.4) based on the temperature dependence of superfluid density [ns(T)] measured by µSR. The gap parameter, 2∆/kBTc, determined from ns(T) exhibits a tendency that hole

Ternary rare earth oxides EuLn2O4 (Ln = Gd, Dy-Lu) were prepared. They crystallized in an orthorhombic CaFe2O4-type structure with space group Pnma. 151Eu Mössbauer spectroscopic measurements show that the Eu ions are in the divalent state. All these compounds show an antiferromagnetic transition